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DateTimeTest.cpp

//
// DateTimeTest.cpp
//
// $Id: //poco/1.2/Foundation/testsuite/src/DateTimeTest.cpp#2 $
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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//


#include "DateTimeTest.h"
#include "CppUnit/TestCaller.h"
#include "CppUnit/TestSuite.h"
#include "Poco/DateTime.h"
#include "Poco/Timestamp.h"
#include "Poco/Timespan.h"
#include "Poco/Exception.h"


using Poco::Timestamp;
using Poco::DateTime;
using Poco::Timespan;
using Poco::AssertionViolationException;


DateTimeTest::DateTimeTest(const std::string& name): CppUnit::TestCase(name)
{
}


DateTimeTest::~DateTimeTest()
{
}


void DateTimeTest::testTimestamp()
{
      Timestamp ts(0); // Unix epoch 1970-01-01 00:00:00 Thursday
      DateTime dt(ts);
      assert (dt.year() == 1970);
      assert (dt.month() == 1);
      assert (dt.day() == 1);
      assert (dt.hour() == 0);
      assert (dt.minute() == 0);
      assert (dt.second() == 0);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 4);
      assert (dt.julianDay() == 2440587.5);
      assert (dt.timestamp() == 0);

      ts = Timestamp::fromEpochTime(1000000000);
      dt = ts; // 2001-09-09 01:46:40 Sunday
      assert (dt.year() == 2001);
      assert (dt.month() == 9);
      assert (dt.day() == 9);
      assert (dt.hour() == 1);
      assert (dt.minute() == 46);
      assert (dt.second() == 40);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 0);
      assert (dt.timestamp().epochTime() == 1000000000);
      assertEqualDelta (dt.julianDay(), 2452161.574074, 0.000001);
}


void DateTimeTest::testJulian()
{
      DateTime dt(2440587.5); // unix epoch as Julian day
      assert (dt.year() == 1970);
      assert (dt.month() == 1);
      assert (dt.day() == 1);
      assert (dt.hour() == 0);
      assert (dt.minute() == 0);
      assert (dt.second() == 0);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 4);
      assert (dt.julianDay() == 2440587.5);
      assert (dt.timestamp() == 0);
      
      dt = 2299160.5; // 1582-10-15 00:00:00 (first day of Gregorian reform, UTC base)
      assert (dt.year() == 1582);
      assert (dt.month() == 10);
      assert (dt.day() == 15);
      assert (dt.hour() == 0);
      assert (dt.minute() == 0);
      assert (dt.second() == 0);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 5);
      assert (dt.julianDay() == 2299160.5);

      dt = 0.0; // -4713-11-24 12:00:00 (Gregorian date of Julian day reference)
      assert (dt.year() == -4713);
      assert (dt.month() == 11);
      assert (dt.day() == 24);
      assert (dt.hour() == 12);
      assert (dt.minute() == 0);
      assert (dt.second() == 0);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 1);
      assert (dt.julianDay() == 0);

    // Test that we can represent down to the microsecond.
    dt = DateTime(2010, 1, 31, 17, 30, 15, 800, 3);

    assert (dt.year() == 2010);
    assert (dt.month() == 1);
    assert (dt.day() == 31);
    assert (dt.hour() == 17);
    assert (dt.minute() == 30);
    assert (dt.second() == 15);
    assert (dt.millisecond() == 800);
    assert (dt.microsecond() == 3);
}


void DateTimeTest::testGregorian()
{
      DateTime dt(1970, 1, 1);
      assert (dt.year() == 1970);
      assert (dt.month() == 1);
      assert (dt.day() == 1);
      assert (dt.hour() == 0);
      assert (dt.minute() == 0);
      assert (dt.second() == 0);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 4);
      assert (dt.julianDay() == 2440587.5);
      assert (dt.timestamp() == 0);
      
      dt.assign(2001, 9, 9, 1, 46, 40);
      assert (dt.year() == 2001);
      assert (dt.month() == 9);
      assert (dt.day() == 9);
      assert (dt.hour() == 1);
      assert (dt.minute() == 46);
      assert (dt.second() == 40);
      assert (dt.millisecond() == 0);
      assert (dt.dayOfWeek() == 0);
      assert (dt.timestamp().epochTime() == 1000000000);
      assertEqualDelta (dt.julianDay(), 2452161.574074, 0.000001);
}


void DateTimeTest::testConversions()
{
      DateTime dt1(2005, 1, 28, 14, 24, 44, 234);
      Timestamp ts1 = dt1.timestamp();
      DateTime dt2(ts1);
      Timestamp ts2 = dt2.timestamp();
      DateTime dt3;
      dt3 = dt1;
      Timestamp ts3 = dt3.timestamp();
      DateTime dt4(dt2);
      Timestamp ts4 = dt4.timestamp();

      assert (ts1 == ts2);
      assert (ts2 == ts3);
      assert (ts3 == ts4);

      assert (dt2.year() == 2005);
      assert (dt2.month() == 1);
      assert (dt2.day() == 28);
      assert (dt2.hour() == 14);
      assert (dt2.minute() == 24);
      assert (dt2.second() == 44);
      assert (dt2.millisecond() == 234);
      assert (dt2.dayOfWeek() == 5);
}


void DateTimeTest::testStatics()
{
      assert (DateTime::isLeapYear(1984));
      assert (DateTime::isLeapYear(1988));
      assert (DateTime::isLeapYear(1992));
      assert (DateTime::isLeapYear(1996));
      assert (DateTime::isLeapYear(2000));
      assert (DateTime::isLeapYear(2400));
      assert (!DateTime::isLeapYear(1995));
      assert (!DateTime::isLeapYear(1998));
      assert (!DateTime::isLeapYear(2001));
      assert (!DateTime::isLeapYear(1800));
      assert (!DateTime::isLeapYear(1900));
      
      assert (DateTime::daysOfMonth(2000, 1) == 31);
      assert (DateTime::daysOfMonth(2000, 2) == 29);
      assert (DateTime::daysOfMonth(1999, 2) == 28);
}


void DateTimeTest::testCalcs()
{
      DateTime dt1(2005, 1, 1);
      assert (dt1.dayOfYear() == 1);
      assert (dt1.week(DateTime::MONDAY) == 0);
      dt1.assign(2005, 1, 3);
      assert (dt1.dayOfYear() == 3);
      assert (dt1.week(DateTime::MONDAY) == 1);
      dt1.assign(2005, 1, 9);
      assert (dt1.dayOfYear() == 9);
      assert (dt1.week(DateTime::MONDAY) == 1);
      dt1.assign(2005, 1, 10);
      assert (dt1.dayOfYear() == 10);
      assert (dt1.week(DateTime::MONDAY) == 2);
      dt1.assign(2005, 2, 1);
      assert (dt1.dayOfYear() == 32);
      assert (dt1.week(DateTime::MONDAY) == 5);
      dt1.assign(2005, 12, 31);
      assert (dt1.week(DateTime::MONDAY) == 52);
      dt1.assign(2007, 1, 1);
      assert (dt1.week(DateTime::MONDAY) == 1);
      dt1.assign(2007, 12, 31);
      assert (dt1.week(DateTime::MONDAY) == 53);
      
      // Jan 1 is Mon
      dt1.assign(2001, 1, 1);  
      assert (dt1.week() == 1);
      dt1.assign(2001, 1, 7);
      assert (dt1.week() == 1);
      dt1.assign(2001, 1, 8);
      assert (dt1.week() == 2);
      dt1.assign(2001, 1, 21);
      assert (dt1.week() == 3);
      dt1.assign(2001, 1, 22);
      assert (dt1.week() == 4);

      // Jan 1 is Tue
      dt1.assign(2002, 1, 1);
      assert (dt1.week() == 1);
      dt1.assign(2002, 1, 6);
      assert (dt1.week() == 1);
      dt1.assign(2002, 1, 7);
      assert (dt1.week() == 2);
      dt1.assign(2002, 1, 20);
      assert (dt1.week() == 3);
      dt1.assign(2002, 1, 21);
      assert (dt1.week() == 4);

      // Jan 1 is Wed
      dt1.assign(2003, 1, 1);
      assert (dt1.week() == 1);
      dt1.assign(2003, 1, 5);
      assert (dt1.week() == 1);
      dt1.assign(2003, 1, 6);
      assert (dt1.week() == 2);
      dt1.assign(2003, 1, 19);
      assert (dt1.week() == 3);
      dt1.assign(2003, 1, 20);
      assert (dt1.week() == 4);
      
      // Jan 1 is Thu
      dt1.assign(2004, 1, 1);
      assert (dt1.week() == 1);
      dt1.assign(2004, 1, 4);
      assert (dt1.week() == 1);
      dt1.assign(2004, 1, 5);
      assert (dt1.week() == 2);
      dt1.assign(2004, 1, 18);
      assert (dt1.week() == 3);
      dt1.assign(2004, 1, 19);
      assert (dt1.week() == 4);

      // Jan 1 is Fri
      dt1.assign(1999, 1, 1);
      assert (dt1.week() == 0);
      dt1.assign(1999, 1, 3);
      assert (dt1.week() == 0);
      dt1.assign(1999, 1, 4);
      assert (dt1.week() == 1);
      dt1.assign(1999, 1, 17);
      assert (dt1.week() == 2);
      dt1.assign(1999, 1, 18);
      assert (dt1.week() == 3);

      // Jan 1 is Sat
      dt1.assign(2000, 1, 1);
      assert (dt1.week() == 0);
      dt1.assign(2000, 1, 2);
      assert (dt1.week() == 0);
      dt1.assign(2000, 1, 3);
      assert (dt1.week() == 1);
      dt1.assign(2000, 1, 16);
      assert (dt1.week() == 2);
      dt1.assign(2000, 1, 17);
      assert (dt1.week() == 3);
      
      // Jan 1 is Sun
      dt1.assign(1995, 1, 1);
      assert (dt1.week() == 0);
      dt1.assign(1995, 1, 2);
      assert (dt1.week() == 1);
      dt1.assign(1995, 1, 3);
      assert (dt1.week() == 1);
      dt1.assign(1995, 1, 15);
      assert (dt1.week() == 2);
      dt1.assign(1995, 1, 16);
      assert (dt1.week() == 3);
}


void DateTimeTest::testAMPM()
{
      DateTime dt1(2005, 1, 1, 0, 15, 30);
      assert (dt1.isAM());
      assert (!dt1.isPM());
      assert (dt1.hourAMPM() == 12);
      
      dt1.assign(2005, 1, 1, 12, 15, 30);
      assert (!dt1.isAM());
      assert (dt1.isPM());
      assert (dt1.hourAMPM() == 12);

      dt1.assign(2005, 1, 1, 13, 15, 30);
      assert (!dt1.isAM());
      assert (dt1.isPM());
      assert (dt1.hourAMPM() == 1);
}


void DateTimeTest::testRelational()
{
    DateTime dt1(2005, 1, 1, 0, 15, 30);
    DateTime dt2(2005, 1, 2, 0, 15, 30);
    DateTime dt3(dt1);
      
    assert (dt1 < dt2);
    assert (dt1 <= dt2);
    assert (dt2 > dt1);
    assert (dt2 >= dt1);
    assert (dt1 != dt2);
    assert (!(dt1 == dt2));
      
    assert (dt1 == dt3);
    assert (!(dt1 != dt3));
    assert (dt1 >= dt3);
    assert (dt1 <= dt3);
    assert (!(dt1 > dt3));
    assert (!(dt1 < dt3));

    static const struct 
    {
        int year;
        int month;  
        int day;
    } values[] = 
    {
        {    1,  1,  1 }, 
        {   10,  4,  5 }, 
        {  100,  6,  7 },
        { 1000,  8,  9 }, 
        { 2000,  1, 31 }, 
        { 2002,  7,  4 },
        { 2002, 12, 31 }, 
        { 2003,  1,  1 }, 
        { 2003,  1,  2 },
        { 2003,  8,  5 }, 
        { 2003,  8,  6 }, 
        { 2003,  8,  7 },
        { 2004,  9,  3 }, 
        { 2004,  9,  4 }, 
    };

    const int num_values = sizeof values / sizeof *values;
    for (int i = 0; i < num_values; ++i) 
    {
        DateTime v;
        const DateTime& V = v;
        v.assign(values[i].year, values[i].month, values[i].day);
        for (int j = 0; j < num_values; ++j) 
        {
            DateTime u;  
            const DateTime& U = u;
            u.assign(values[j].year, values[j].month, values[j].day);

            loop_2_assert(i, j, j <  i == U <  V);
            loop_2_assert(i, j, j <= i == U <= V);
            loop_2_assert(i, j, j >= i == U >= V);
            loop_2_assert(i, j, j >  i == U >  V);
        }
    }
}


void DateTimeTest::testArithmetics()
{
    DateTime dt1(2005, 1, 1, 0, 15, 30);
    DateTime dt2(2005, 1, 2, 0, 15, 30);
      
    Timespan s = dt2 - dt1;
    assert (s.days() == 1);
      
    DateTime dt3 = dt1 + s;
    assert (dt3 == dt2);
      
    dt3 -= s;
    assert (dt3 == dt1);
    dt1 += s;
    assert (dt1 == dt2);

    static const struct 
    {
        int lineNum;          // source line number
        int year1;                  // operand/result date1 year
        int month1;                 // operand/result date1 month
        unsigned int day1;    // operand/result date1 day
        int numDays;          // operand/result 'int' number of days
        int year2;                  // operand/result date2 year
        int month2;                 // operand/result date2 month
        unsigned int day2;    // operand/result date2 day
    } data[] = 
    {
        //          - - - -first- - - -           - - - second - - - 
        //line no.  year   month   day   numDays  year   month   day
        //-------   -----  -----  -----  -------  -----  -----  ----- 
        { __LINE__,       1,     1,     1,      1,      1,     1,     2 },
        { __LINE__,      10,     2,    28,      1,     10,     3,     1 },
        { __LINE__,     100,     3,    31,      2,    100,     4,     2 },
        { __LINE__,    1000,     4,    30,      4,   1000,     5,     4 },
        { __LINE__,    1000,     6,     1,    -31,   1000,     5,     1 },
        { __LINE__,    1001,     1,     1,   -365,   1000,     1,     1 },
        { __LINE__,    1100,     5,    31,     30,   1100,     6,    30 },
        { __LINE__,    1200,     6,    30,     32,   1200,     8,     1 },
        { __LINE__,    1996,     2,    28,    367,   1997,     3,     1 },
        { __LINE__,    1997,     2,    28,    366,   1998,     3,     1 },
        { __LINE__,    1998,     2,    28,    365,   1999,     2,    28 },
        { __LINE__,    1999,     2,    28,    364,   2000,     2,    27 },
        { __LINE__,    1999,     2,    28,   1096,   2002,     2,    28 },
        { __LINE__,    2002,     2,    28,  -1096,   1999,     2,    28 },
    };

    const int num_data = sizeof data / sizeof *data;
    for (int di = 0; di < num_data; ++di) 
    {
        const int line     = data[di].lineNum;
        const int num_days = data[di].numDays;
        DateTime x = DateTime(data[di].year1, data[di].month1, data[di].day1);
        const DateTime& X = x;
        x += Timespan(num_days, 0, 0, 0, 0);
        loop_1_assert(line, data[di].year2 == X.year());
        loop_1_assert(line, data[di].month2 == X.month());
        loop_1_assert(line, data[di].day2 == X.day());
    }
}

void DateTimeTest::testIncrementDecrement()
{
    static const struct 
    {
        int lineNum;          // source line number
        int year1;                  // (first) date year
        int month1;                 // (first) date month
        unsigned int day1;    // (first) date day
        int year2;                  // (second) date year
        int month2;                 // (second) date month
        unsigned int day2;    // (second) date day
    } data[] = 
    {
       //          - - - -first- - - -    - - - second - - - 
       //line no.  year   month   day     year   month   day
       //-------   -----  -----  -----    -----  -----  ----- 
      { __LINE__,       1,     1,     1,       1,     1,     2 },
      { __LINE__,      10,     2,    28,      10,     3,     1 },
      { __LINE__,     100,     3,    31,     100,     4,     1 },
      { __LINE__,    1000,     4,    30,    1000,     5,     1 },
      { __LINE__,    1100,     5,    31,    1100,     6,     1 },
      { __LINE__,    1200,     6,    30,    1200,     7,     1 },
      { __LINE__,    1300,     7,    31,    1300,     8,     1 },
      { __LINE__,    1400,     8,    31,    1400,     9,     1 },
      { __LINE__,    1500,     9,    30,    1500,    10,     1 },
      { __LINE__,    1600,    10,    31,    1600,    11,     1 },
      { __LINE__,    1700,    11,    30,    1700,    12,     1 },
      { __LINE__,    1800,    12,    31,    1801,     1,     1 },
      { __LINE__,    1996,     2,    28,    1996,     2,    29 },
      { __LINE__,    1997,     2,    28,    1997,     3,     1 },
      { __LINE__,    1998,     2,    28,    1998,     3,     1 },
      { __LINE__,    1999,     2,    28,    1999,     3,     1 },
      { __LINE__,    2000,     2,    28,    2000,     2,    29 },
      { __LINE__,    2001,     2,    28,    2001,     3,     1 },
      { __LINE__,    2004,     2,    28,    2004,     2,    29 },
      { __LINE__,    2100,     2,    28,    2100,     3,     1 },
      { __LINE__,    2400,     2,    28,    2400,     2,    29 },
    };

    const int num_data = sizeof data / sizeof *data;
    int di;

    for (di = 0; di < num_data; ++di) 
    {
        const int line = data[di].lineNum;
        DateTime x = DateTime(data[di].year1, data[di].month1, 
                              data[di].day1);
        // Would do pre-increment of x here.
        const DateTime& X = x;
        x = x + Timespan(1,0,0,0,0);  
        DateTime y = x; const DateTime& Y = y;

        loop_1_assert(line, data[di].year2  == X.year());
        loop_1_assert(line, data[di].month2 == X.month());
        loop_1_assert(line, data[di].day2   == X.day());

        loop_1_assert(line, data[di].year2  == Y.year());
        loop_1_assert(line, data[di].month2 == Y.month());
        loop_1_assert(line, data[di].day2   == Y.day());
    }

    for (di = 0; di < num_data; ++di) 
    {
        const int line = data[di].lineNum;
        DateTime x = DateTime(data[di].year1, data[di].month1, data[di].day1);
        DateTime x1 = DateTime(data[di].year1, data[di].month1, data[di].day1);
        DateTime x2 = DateTime(data[di].year2, data[di].month2, data[di].day2);
        DateTime y = x; const DateTime& Y = y;

        // Would do post increment of x here.
        const DateTime& X = x;
        x = x + Timespan(1,0,0,0,0);  

        loop_1_assert(line, data[di].year2  == X.year());
        loop_1_assert(line, data[di].month2 == X.month());
        loop_1_assert(line, data[di].day2   == X.day());
        loop_1_assert(line, data[di].year1  == Y.year());
        loop_1_assert(line, data[di].month1 == Y.month());
        loop_1_assert(line, data[di].day1   == Y.day());
    }
            
    for (di = 0; di < num_data; ++di) 
    {
        const int line = data[di].lineNum;
        DateTime x = DateTime(data[di].year2, data[di].month2, data[di].day2);
        const DateTime& X = x;
        x = x - Timespan(1,0,0,0,0);  
        DateTime y = x; DateTime Y = y;

        loop_1_assert(line, data[di].year1  == X.year());
        loop_1_assert(line, data[di].month1 == X.month());
        loop_1_assert(line, data[di].day1   == X.day());

        loop_1_assert(line, data[di].year1  == Y.year());
        loop_1_assert(line, data[di].month1 == Y.month());
        loop_1_assert(line, data[di].day1   == Y.day());
    }

    for (di = 0; di < num_data; ++di) 
    {
        const int line = data[di].lineNum;
        DateTime x1 = DateTime(data[di].year1, data[di].month1, data[di].day1);
        DateTime x = DateTime(data[di].year2, data[di].month2, data[di].day2);
        DateTime y = x; DateTime Y = y;
        const DateTime& X = x;
        // would post-decrement x here.
        x = x - Timespan(1,0,0,0,0);  

        loop_1_assert(line, data[di].year1  == X.year());
        loop_1_assert(line, data[di].month1 == X.month());
        loop_1_assert(line, data[di].day1   == X.day());

        loop_1_assert(line, data[di].year2  == Y.year());
        loop_1_assert(line, data[di].month2 == Y.month());
        loop_1_assert(line, data[di].day2   == Y.day());
    }
}


void DateTimeTest::testSwap()
{
      DateTime dt1(2005, 1, 1, 0, 15, 30);
      DateTime dt2(2005, 1, 2, 0, 15, 30);
      DateTime dt3(2005, 1, 1, 0, 15, 30);
      DateTime dt4(2005, 1, 2, 0, 15, 30);
      
      dt1.swap(dt2);
      assert (dt2 == dt3);
      assert (dt1 == dt4);
}


void DateTimeTest::testUsage()
{
    DateTime dt1(1776, 7, 4);
    assert (dt1.year() == 1776);
    assert (dt1.month() == 7);
    assert (dt1.day() == 4);

    DateTime dt2(dt1);
    dt2 += Timespan(6, 0, 0, 0, 0);
    assert (dt2.year() == 1776);
    assert (dt2.month() == 7);
    assert (dt2.day() == 10);

    Timespan span = dt2 - dt1;
    assert (span.days() == 6);

    // TODO - When adding months and years we need to be
    // able to specify the end-end convention.
    // We cannot do this in POCO at the moment.
}


void DateTimeTest::testSetYearDay()
{
    static const struct 
    {
        int d_lineNum;              // source line number
        int d_year;                       // year under test
        unsigned int d_day;         // day-of-year under test
        int d_expMonth;             // expected month
        unsigned int d_expDay;      // expected day
    } data[] = 
    {
            //line no.  year   dayOfYr     exp. month   exp. day
            //-------   -----  -------     ----------   --------
            { __LINE__,          1,       1,          1,         1 },   
            { __LINE__,          1,       2,          1,         2 },
            { __LINE__,          1,     365,         12,        31 },
            { __LINE__,       1996,       1,          1,         1 },   
            { __LINE__,       1996,       2,          1,         2 },
            { __LINE__,       1996,     365,         12,        30 },
            { __LINE__,       1996,     366,         12,        31 }
    };

    const int num_data = sizeof data / sizeof *data;
    for (int di = 0; di < num_data; ++di) 
    {
        const int line      = data[di].d_lineNum;
        const int year      = data[di].d_year;
        const unsigned int day = data[di].d_day;

        const int exp_month = data[di].d_expMonth;
        const unsigned int exp_day   = data[di].d_expDay;
        const DateTime r(year, exp_month, exp_day);
        DateTime x;
        const DateTime& X = x;

#if 0
        // TODO - need to be able to assign a day number in the year
        // but POCO is not able to do this.

        x.assign(year, day);                

        // TODO - need to be able to assert with the loop counter
        // but cppUnit is not able to do this.

        assert (r   == x);
        assert (day == X.dayOfYear());
#endif
    }

    static const struct 
    {
        int d_lineNum;  // source line number
        int d_year;     // year under test
        int d_day;      // day-of-year under test
        int d_exp;      // expected status
    } data2[] = 
    {
        //line no.  year   dayOfYr     expected value
        //-------   -----  -------     --------------
        { __LINE__,          1,       1,          1 },   
        { __LINE__,          1,      -1,          0 },
        { __LINE__,          1,       0,          0 },
        { __LINE__,          1,     365,          1 },
        { __LINE__,          1,     366,          0 },
        { __LINE__,          1,     367,          0 },
        { __LINE__,          0,       0,          0 },   
        { __LINE__,         -1,      -1,          0 },   
        { __LINE__,       1996,       1,          1 },   
        { __LINE__,       1996,       2,          1 },
        { __LINE__,       1996,      32,          1 },
        { __LINE__,       1996,     365,          1 },
        { __LINE__,       1996,     366,          1 },
        { __LINE__,       1996,     367,          0 },
      };

    const int num_data2 = sizeof data2 / sizeof *data2;
    for (int di = 0; di < num_data2; ++di) 
    {
        const int line  = data2[di].d_lineNum;
        const int year  = data2[di].d_year;
        const int day   = data2[di].d_day;
        const int exp   = data2[di].d_exp;
        DateTime x;  
        const DateTime& X = x;
        if (1 == exp)
        {
            DateTime r;
            const DateTime& r2 = r;
#if 0
            r.set(year, day);
#endif
        }
    }
}


void DateTimeTest::testIsValid()
{
    static const struct 
    {
        int  d_lineNum;  // source line number
        int  d_year;     // year under test
        int  d_month;    // month under test
        int  d_day;      // day under test
        bool d_exp;      // expected value
    } data[] = 
    {
            //line no.  year   month   day     expected value
            //-------   -----  -----  -----    --------------
            { __LINE__,    0,     0,     0,      false },   
            { __LINE__,    1,     1,     0,      false },   
            { __LINE__,    1,     0,     1,      false },   
            { __LINE__,    0,     1,     1,      true },   
            { __LINE__,    1,     1,    -1,      false },   
            { __LINE__,    1,    -1,     1,      false },   
            { __LINE__, 2004,     1,    32,      false },   
            { __LINE__, 2004,     2,    30,      false },   
            { __LINE__, 2004,     3,    32,      false },   
            { __LINE__, 2004,     4,    31,      false },   
            { __LINE__, 2004,     5,    32,      false },   
            { __LINE__, 2004,     6,    31,      false },   
            { __LINE__, 2004,     7,    32,      false },   
            { __LINE__, 2004,     8,    32,      false },   
            { __LINE__, 2004,     9,    31,      false },   
            { __LINE__, 2004,    10,    32,      false },   
            { __LINE__, 2004,    11,    31,      false },   
            { __LINE__, 2004,    12,    32,      false },   
            { __LINE__,    0,    12,    31,      true },
            { __LINE__,    0,     2,    29,      true },
            { __LINE__,    1,     1,     1,      true }, 
            { __LINE__, 2010,     1,     2,      true }, 
            { __LINE__, 2011,     2,     5,      true }, 
            { __LINE__, 2012,     3,    10,      true }, 
            { __LINE__, 2013,     4,    17,      true }, 
            { __LINE__, 2014,     5,    23,      true }, 
            { __LINE__, 1600,     2,    29,      true },   
            { __LINE__, 1700,     2,    29,      false },   
            { __LINE__, 1800,     2,    29,      false },   
            { __LINE__, 1900,     2,    29,      false },   
            { __LINE__, 2000,     2,    29,      true },   
            { __LINE__, 2100,     2,    29,      false },   
      };

    const int num_data = sizeof data / sizeof *data;
    for (int di = 0; di < num_data; ++di) 
    {
        const int  line  = data[di].d_lineNum;
        const int  year  = data[di].d_year;
        const int  month = data[di].d_month;
        const int  day   = data[di].d_day;
        const bool exp   = data[di].d_exp;

            bool isValid = DateTime::isValid(year, month, day);
        loop_1_assert(line, exp == isValid);
    }
}


void DateTimeTest::testDayOfWeek()
{
    typedef DateTime::DaysOfWeek DOW;

    static const struct 
    {
        int d_lineNum;  // source line number
        int d_year;           // year under test
        int d_month;    // month under test
        int d_day;            // day under test
        DOW d_expDay;   // number of days to be added
    } data[] = 
    {
            //Line no.    year   month   day    expDay
            //-------   -----  -----  -----   -------
            { __LINE__,  1600,   1,       1,   DateTime::SATURDAY  },
            { __LINE__,  1600,   1,       2,   DateTime::SUNDAY    },         
            { __LINE__,  1600,   1,       3,   DateTime::MONDAY    },
            { __LINE__,  1600,   1,       4,   DateTime::TUESDAY   },
            { __LINE__,  1600,   1,       5,   DateTime::WEDNESDAY },     
            { __LINE__,  1600,   1,       6,   DateTime::THURSDAY  },
            { __LINE__,  1600,   1,       7,   DateTime::FRIDAY    },
            { __LINE__,  1600,   1,       8,   DateTime::SATURDAY  },
            { __LINE__,  1752,   8,      27,   DateTime::SUNDAY    },
            { __LINE__,  1752,   8,      28,   DateTime::MONDAY    },
            { __LINE__,  1752,   8,      29,   DateTime::TUESDAY   },
            { __LINE__,  1752,   8,      30,   DateTime::WEDNESDAY },
            { __LINE__,  1752,   8,      31,   DateTime::THURSDAY  },
            { __LINE__,  1752,   9,       1,   DateTime::FRIDAY    },
            { __LINE__,  1752,   9,       2,   DateTime::SATURDAY  },         
            { __LINE__,  1752,   9,      14,   DateTime::THURSDAY  },
            { __LINE__,  1752,   9,      15,   DateTime::FRIDAY    },
            { __LINE__,  1752,   9,      16,   DateTime::SATURDAY  },     
            { __LINE__,  1752,   9,      17,   DateTime::SUNDAY    },
            { __LINE__,  1752,   9,      18,   DateTime::MONDAY    },
            { __LINE__,  1752,   9,      19,   DateTime::TUESDAY   },
            { __LINE__,  1999,  12,      28,   DateTime::TUESDAY   },
            { __LINE__,  1999,  12,      29,   DateTime::WEDNESDAY },         
            { __LINE__,  1999,  12,      30,   DateTime::THURSDAY  },
            { __LINE__,  1999,  12,      31,   DateTime::FRIDAY    },
            { __LINE__,  2000,   1,       1,   DateTime::SATURDAY  },     
            { __LINE__,  2000,   1,       2,   DateTime::SUNDAY    },
            { __LINE__,  2000,   1,       3,   DateTime::MONDAY    },
            { __LINE__,  2000,   1,       4,   DateTime::TUESDAY   },
    };
            
    const int num_data = sizeof data / sizeof *data;
    for (int di = 0; di < num_data ; ++di) 
    {
        const int line = data[di].d_lineNum;
        DateTime x = DateTime(data[di].d_year, data[di].d_month, data[di].d_day);
        const DateTime& X = x;
        loop_1_assert(line, data[di].d_expDay == X.dayOfWeek());
    }
}


void DateTimeTest::setUp()
{
}


void DateTimeTest::tearDown()
{
}


CppUnit::Test* DateTimeTest::suite()
{
      CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("DateTimeTest");

      CppUnit_addTest(pSuite, DateTimeTest, testTimestamp);
      CppUnit_addTest(pSuite, DateTimeTest, testJulian);
      CppUnit_addTest(pSuite, DateTimeTest, testGregorian);
      CppUnit_addTest(pSuite, DateTimeTest, testConversions);
      CppUnit_addTest(pSuite, DateTimeTest, testStatics);
      CppUnit_addTest(pSuite, DateTimeTest, testCalcs);
      CppUnit_addTest(pSuite, DateTimeTest, testAMPM);
      CppUnit_addTest(pSuite, DateTimeTest, testRelational);
      CppUnit_addTest(pSuite, DateTimeTest, testArithmetics);
      CppUnit_addTest(pSuite, DateTimeTest, testSwap);

      CppUnit_addTest(pSuite, DateTimeTest, testUsage);
      CppUnit_addTest(pSuite, DateTimeTest, testSetYearDay);
      CppUnit_addTest(pSuite, DateTimeTest, testIsValid);
      CppUnit_addTest(pSuite, DateTimeTest, testDayOfWeek);
      CppUnit_addTest(pSuite, DateTimeTest, testIncrementDecrement);

      return pSuite;
}

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